Table 1. Demographic data of the age-related ptosis (AP) and contact lens-related ptosis (CLP) groups.

	AP			CLP			P-value
Number of eyes	85			23			-
Age (years)	73.8±7.6			47.7±6.6			<0.01*
Sex (male:female)	13:32			3:10			>0.05**
	Pre-operative value	Post-operative value	P-value ***	Pre-operative value	Post-operative value	P-value ***	-
MRD (mm)	0.78±0.92	3.22±1.15	<0.001	0.70±0.51	3.85±0.53	<0.001	-
Visual acuity (logMar)	0.05±0.92	0.04±0.89	>0.05	−0.08±1.00	−0.08+1.15	>0.05	-

*Mann–Whitney U test,

**chi-square test, and

***student’s t-test.